Wouldn't be considered until there're so many hentai threads in the OT section - for the time being, a "hentai" tag in the thread title is sufficient for warning off those who don't like hentai materials.
The problem is there are times your browser is lagging. If its a thread above, below or close by your clicking you accidentally go to a page you really didn't want to see in the first place.
I'll make a sub-forum for OT hentai.
Could always make an off-topic subforum in the hentai section.
The existing hentai subforum is for Sailor Moon
hentai only, tho, so the OT hentai subforum will be separate from it. [EDIT]
It's done now.